Decent enough game play and regular events. An idle game, so not super complicated. However, the ads have lately gone berserk. A bunch of 60-second ads everywhere and many of them don't even have timers. Some of them are even self-actuating - opening the app/play store for you on its own. I enjoyed it enough to be willing to purchase the ad-free option, but at $15 it's horribly overpriced and it's never gone on sale as long as I've played. I'm afraid after I finish the current mine, uninstall.

1. Not at ALL the game shown in the ads. 2. No skill required. It just takes time. Goblins are literally breaking rocks. You watch them break rocks. 3. This is also ingenious because it gets you to check into the game constantly to progress. The game designers create a lot of urgency, but one more obligation isn't what my life needs. 4. Watch ads to progress faster! Finish a level? Have another ad!

After having this for about a year and reaching Mine 43 without buying any upgrades, it's become a chore. At first the experience of this idle game is pretty fun despite it not being like the advertisements. But after reaching a certain point it takes literal hours to progress, which could be attributed to the developer(s) wanting you to buy materials for upgrades via microtransactions. Unless you have money to just throw away and for a mobile game don't play this game.